I'm not going to lie...I bricked it on the part where the lift crashed, the blob Zombie with the screamers where and I just ran past it.
Dead space is the most frightening game I've played.
I think it becomes scary when you play on a harder difficulty with limited supplies. The fear of being being detected and chased down by a horde of infected with not enough ammo to take them out is what makes it scary for me. The Clicker sounds are pretty scary i think when you're stealthing through a section as they get louder and closer. Wearing headphones makes it scary, just like any other horror game.